Mercer Connectors

Mercer Rubber Company, established in 1866, is the oldest U.S. manufacturer of rubber expansion joints, flexible duct connectors and industrial hose. All connectors are hand built to the highest standards.

Mercer has successfully analysed and designed a wide range of products for demanding applications. Our specialty is developing custom products for a specific job, from a single small joint to hundreds of large diameter joints needed for power generating projects.

Hand built flexible connectors for piping and duct work solve problems that cannot be handled by other materials. Rubber is more compliant and resilient than metal, fiberglass or plastic. The technology behind building shapes for industrial applications has grown as well. Modern reinforcement fabrics and tire cord have completely replaced early designs using cotton and rayon. The end result has been a lighter, more flexible, higher pressure and temperature resistant product.

Rubber expansion joints are capable of axial compression, axial expansion, transverse and angular movements. In many cases, three movements are all taking place at one time. Standard expansion joints have movement limits, but they can be increased by changing to multiple arches or single piece construction with an arch at each end and a long intermediate hose body. 

Mercer Connectors have great flexibility and have higher limits the other products.

Mercer has extensive experience in the Power, Wastewater treatment, Industrial and Chemical Industries, as well as HVAC Commercial and Marine work. These customers rely on Mercer products for high reliability and a long, virtually maintenance free life. Have a large project? Our professional engineering team can provide you with a uniquely designed solution. With over 100 years of experience, Mercer Rubber is more than capable of handling large and complex projects. See the following photos of a bespoke hinged joint connector for example. 

Documents & Files

Care must be taken to ensure that expansion joints are installed correctly. See the following installation instructions for detailed information.

Please see the extensive range of Mercer connectors available below.

Mercer Product Range

Series 300 Sleeve Type Expansion Joint

Our Mercer series 300 sleeve type expansion joints are available in a large variety of tube and cover material for different applications. Such materials as EPDM, Hypalon, Neoprene, Nitrile and more.

Series 450 Flexmore Expansion Joint

Mercer Flexmore Series 450 is the most economical, full-pressure elastomeric expansion joint available. Tough fabric and tirecord plies are bonded between the tube and cover in a steel mould and then cured in a thermostatically controlled steam chamber.

Series 500 & 600 Invincible Heavy Duty Expansion Joints

The Mercer Invincible 500 and 600 series are our most rugged expansion joints. They are all hand built by our skilled craftsmen.

Series 700 Invincible Teflon Lined Expansion Joints

Mercer Invincible Series 700 Teflon® lined expansion joints combine the advantages of Teflon’s® anti-stick properties, superior strength, excellent chemical resistance and non-aging, with the advantages of Mercer’s elastomeric expansion joints.

Series 800 Teflon Lined Expansion Joints

MERCER Series 800 PTFE Teflon® expansion joints are the sure and economical way to solve difficult expansion and misalignment problems. The Teflon® material is corrosive-proof, chemically inert and does not age.

Series 1000 Low Spring Rate, Large Movement Expansion Joints

The Series 1000 are low spring rate, large movement expansion joints for applications where significant movement is required in the pipeline.

VIBRAFLEX 150 Reinforced Rubber Pipe (Fluid Service)

The Mercer Vibraflex reinforced rubber pipe is hand built by our skilled craftsmen. To minimize pipe elongation, the carcass is constructed of multiple plies of high tensile polyester tire cord or Kevlar for high temperatures.

Mercer Duct Connectors

Flexible Connectors are used in duct systems to reduce vibration transmission and shock and accommodate thermal movements at minimum stress to the ductwork.

Concentric & Eccentric Reducers

These products are flanged concentric and eccentric reducing expansion joints with spherical arches. The carcass is made of multiple plies of tough, rubber impregnated fabric or tire cord with rubber and duck flanges integral with body.